# Engineering Mechanics MCQ - Multiple Choice Question and Answer

## Engineering Mechanics MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

Question No : 1
The force applied on a body of mass 100 kg to produce an acceleration of 5 m/s2, is

20 N
100 N
500 N
None of these

Question No : 2
The velocity ratio for the first system of pulleys is (where n is the number of pulleys.)

n
2n
2n - 1

Question No : 3
For a self locking machine, the efficiency must be

Equal to 50 %
Less than 50 %
Greater than 50 %
100 %

Question No : 4
The forces, which meet at one point, but their lines of action do not lie in a plane, are called

Coplanar non-concurrent forces
Non-coplanar concurrent forces
Non-coplanar non-concurrent forces
Intersecting forces

Question No : 5
Least force required to draw a body up the inclined plane is W sin (plane inclination + friction angle) applied in the direction

Along the plane
Horizontally
Vertically
At an angle equal to the angle of friction to the inclined plane

Question No : 6
In a single threaded worm and worm wheel, the number of teeth on the worm is 50. The diameter of the effort wheel is 100 mm and that of load drum is 50 mm. The velocity ratio is

50
100
200
400

Question No : 7
The term 'Centroid' is

The same as centre of gravity
The point of suspension
The point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis
None of the above